Overview

overview

10

Static

static

5

2026-07-29...os.exe

windows10-2004-x64

10

2026-07-29...os.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    135s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    29/07/2026, 23:54

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General

  • Target
    2026-07-29_b20b949bbde56348f36a8dc7a3cab995_agent-tesla_amadey_darkgate_elex_hawkeye_maze_nanocore-rat_remcos.exe
  • Size 1.1MB
  • Sample260729-3yaj6syshz
  • SHA256 972a5a49e37f50123c56c26ea906f03d54f519b109eebc665538b33976ebef00
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defense_evasiondiscoverynanocorekeyloggerpersistenceprivilege_escalationspywarestealertrojan

Malware Config

Extracted

Family

  • nanocore

Version

  • 1.2.2.0

C2

  • windowslivesoffice.ddns.net:20377

  • 127.0.0.1:20377

Mutex

  • ebebb95b-836f-4d8b-92f1-dafac3cec9d8

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2019-03-14T13:33:18.176993536Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    20377

  • default_group

    02/06/2019

  • enable_debug_mode

    true

  • gc_threshold

    1.048576e+07

  • keep_alive_timeout

    30000

  • keyboard_logging

    false

  • lan_timeout

    2500

  • max_packet_size

    1.048576e+07

  • mutex

    ebebb95b-836f-4d8b-92f1-dafac3cec9d8

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    windowslivesoffice.ddns.net

  • primary_dns_server

    8.8.8.8

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    false

  • set_critical_process

    true

  • timeout_interval

    5000

  • use_custom_dns_server

    false

  • version

    1.2.2.0

  • wan_timeout

    8000

Signatures

  • Family: NanoCore

    NanoCore is a remote access tool (RAT) with a variety of capabilities.

    keyloggertrojanstealerspywarenanocore
  • Creates a file in the Startup directory 1 TTPs 1 IoCs

    A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

    persistenceprivilege_escalation
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
    defense_evasiontrojan
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of SendNotifyMessage 3 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-07-29_b20b949bbde56348f36a8dc7a3cab995_agent-tesla_amadey_darkgate_elex_hawkeye_maze_nanocore-rat_remcos.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-07-29_b20b949bbde56348f36a8dc7a3cab995_agent-tesla_amadey_darkgate_elex_hawkeye_maze_nanocore-rat_remcos.exe"
    1⤵
    • Creates a file in the Startup directory
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:5108
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
      2⤵
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:3380
  • C:\Program Files (x86)\SMTP Monitor\smtpmon.exe
    "C:\Program Files (x86)\SMTP Monitor\smtpmon.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1948

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        smtpmon.exe
        • Path C:\Program Files (x86)\SMTP Monitor\smtpmon.exe
        • Size 52KB
        • SHA256 f54e019c1896811e1d737c9f15b6b50b43ad6bff3a1dd952662f1b5bdc4069b9
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/1948-13-0x00000000740D0000-0x00000000746F1000-memory.dmp
        Download

        memory/1948-16-0x00000000740D0000-0x00000000746F1000-memory.dmp
        Download

        memory/3380-4-0x0000000000400000-0x0000000000438000-memory.dmp
        Download

        memory/3380-9-0x0000000002320000-0x0000000002330000-memory.dmp
        Download

        memory/3380-10-0x00000000740D2000-0x00000000740D4000-memory.dmp
        Download

        memory/3380-14-0x0000000002320000-0x0000000002330000-memory.dmp
        Download

        memory/3380-15-0x00000000740D2000-0x00000000740D4000-memory.dmp
        Download

        memory/5108-3-0x0000000003420000-0x0000000003421000-memory.dmp
        Download